ZWO ASI120MM-S Monochrome (3.75 microns) CMOS Camera with USB 3.0 Connection

Article number: ASI120MM-S
Availability: Order Now!
Delivery time: Regularly stocked item that is on order with the manufacturer and on its way to our warehouse. Expected to arrive within 7-14 business days.

ASI120S is a super speed and sensitive USB3.0 camera. Up to 60FPS under 1280X960 full resolution! With a peak QE of 75%, beyond ICX618 and with no FPN(Fixed pattern Noise)! Long time exposure supported up to 1000s! Full compatible with USB 2.0 USB Host!

120 Gain RN DR FW vs gain
What’s in the box
–ZWO ASI120MM-S Monochrome 1.2 Mega Pixel Astronomy Camera
–150° Lens Adapter for use as an all-sky camera
–M42-1.25″ nosepiece
–1.25″ IR-cut window
–2 m long USB cable
–2 m long ST4 guider cable
–Driver & Extra Software CD


Camera technical details

Sensor: 1/3″ CMOS AR0130CS(Color) / MT9M034(mono)
Resolution: 1.2Mega Pixels 1280×960
Pixel Size: 3.75µm
Exposure Range: 64µs-1000s
ROI: Supported
Interface: USB3.0/USB2.0
Bit rate: 12bit output(12bit ADC)
Adaptor: 2″ / 1.25″ / M42X0.75
Dimension: φ62mm X 28mm
Weight: 100g
Working Temperature: -5°C—45°C
Storage Temperature: -20°C—60°C
Working Relative Humidity: 20%—80%
Storage Relative Humidity: 20%—95%

Supported resolution

Binning 1×1:
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Binning 2×2:
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*Tested under USB3.0 port without overclocking. There is an option to overclock 30% of the current fps

Before first usage of this product read manuals and install correct drivers and software.

To support our newest cameras: ASI290 and ASI1600

follow softwares newest version required

SharpCap V2.8.2325 and up

Firecapture V2.5.03 and up


Posted questions, answers & comments

  1. eppe Dam:

    Is it possible to use the color camera without the IR-cut window? And can I get the raw image (without color conversion) so I can analyze the raw IR image directly?

  2. Oleg (verified owner):

    Is it possible to use a USB 3.0 camera such as ASI120MM-S (mono) with a USB 2.0 active repeater cable? My computer does recognize ASI120MM-S when it is plugged directly into USB 2.0 port, but for some reason fails to recognize the camera when plugged in via USB 2.0 active repeater cable

    • Sam Wen

      Sam Wen:

      yes, our USB3.0 is compatible with USB2.0 host
      and the USB2.0 cable can be longer than USB3.0 one



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